<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>zuoye2</title>
  </head>
  <body>
    <script>
      var age = +prompt("你现在多少岁了？");
      age = age + 5;
      console.log(`据我估计，五年后，你可能${age}岁了`);
    </script>
  </body>
</html>
